Loom-take-up.



PATENTED DEC. 29, 1903.

A. F. CASWELL.

LOOM TAKE-UP.

APPLICATION FILED JULY 9, 1903.

NO MODEL.

UNITED STATES iatentd fiecernloer 29, 1903.

PATENT OFFICE.

ARTHUR F. oASwELL, OF TAUNTON, MASSACHUSETTS, ASSIGNOR on ONE- HALF TOHERBERT H. SHUMWAY, 0F TAUNTON, MAsSAcHUSETTs.

LOOM TAKE-UP.

SPECIFICATION formingpart of Letters Patent No. 748,262, dated December29, 1903.

Application filed July 9,1903. Serial No. 164,831. (No model.)

To aZZ whowt it may concern."

Be it known that I, ARTHUR F. OASWELL, a resident of Taunton, in thecounty of Bristol and State of Massachusetts, have invented certain newand useful Improvements in Loom Take-Ups; and I do hereby declare thatthe following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this specification.

This invention pertains to take-up mechanism for looms wherein provisionis made for arresting and also letting back the takeup by the action oroperation of the weftfork or fillingdetector, which latter operates atevery other pick to detect the presence or absence of the filling, as isvery common in looms. When the weft-thread breaks or the filling isexhausted from the shuttle, there will be a pick, or perhaps two picks,of filling absent in the cloth before the weftthread is properly laidagain. In weaving light fabric it is found of great advantage to letback two or three teeth at such times to prevent making thin places inthe cloth.

My invention has for its object the production of an extremely-simplemechanism which will operate to stop the take-up roll and to let backtwo or three picks when a break occurs or when theshuttle fails to laythe weftthread in weaving light goods. This is effected by arranging thedetent-pawl of the take-up so that it, with the actuating-pawl, will beraised out of engagement with the ratchet-wheel and let back apredetermined number of picks. The same mechanism may also be soadjusted that when weaving heavier goods the take-up roll will beinstantly arrested when the fork fails to find the weftthread and allowsaid take-up to remain at rest for a predetermined number of picks afterstarting up the loom again.

The invention consists of novel features and parts and combinations ofthe same, as will be fully described hereinafter and then pointed out inclaims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is an end elevation of a portion of the loom, showing mytake-up and let-back mechanism attached thereto. Fig. 2 shows a portionof the loom in side elevation and a portion of the take-up mechanism.Fig. 3 is an enlarged perspective View of my mechanism for producing adwell or rest of the take-up roll when the filling is absent. Fig. 4 isa perspective view of the plate on which the detent-pawl is hung, to beset rigidly or allowed to slide longitudinally. Fig. 5 is a perspectiveview of the weft-fork-operated detent-pawl.

Referring to the drawings, A is the end frame of the loom, B is the lay,and O is the breast-beam. A

D is the weft-fork, pivoted on the slide d, that is mounted on thebreast-beam.

c is the projection at the rear end of the slide, against which normallyrests the lever E,which lever is mounted on and fixed to the rod e, thatruns along under the breast-beam. This rod e extends out through theframe beyond the end of the loom and has a crank G on its end. On thepin 9 of this crank is mounted and fixed the plate R, on which plate ishung the detent-pawl b. The usual ratchetwheel F, connected by a trainof gears to the take-up roll in the well-known manner, is actuated bypawlH from the cam 71, said cam being rotated by the crank-shaft I.

In weaving light goods when it is desired to use the let-back motion Iconnect the outer end of the detent b and the free end of theactuating-pawl H together, preferably by a strap h or other suitableflexible connection, so that when the detent is raised theactuating-pawl will also be raised and allow the ratchet to turn backuntil stopped by the letbackpawl K. This let-back pawl engages theratchet-wheel F between the actuatingpawl and the detent-pawl, theopposite end of which is slotted at j. A pin or bolt Z pro- The plate orlever R (see Fig. 4) has a hole 7' in one end, into which fits thecrank-pin g and on which this plate is held in the desired position bythe set-screw s. The guide-bolt T extends through the slot b in thedetent b and serves as guide on which the latter slides. The pintextends out from said plate into the toothed slot 1) in said detent, anedge i being formed on its lower side for engaging manner and actsthrough the lever E and shaft 6 to raise the detent b out of engagementwith the ratchet F; The raising of this detent simultaneously raises theactuatingpawl H through the connection h,and the takeup is free to turnback by the tension of the warp-threads until it is stopped by theregulating-screwm in the let-back pawl. (Illustrated in Fig. 1.) Theflexibility of this connection h allows the actuating-pawl H thenecessary freedom for its reciprocating motion. As there is not aparticularly heavy tension on the warp threads, and consequently on thepawls, in these light goods, it is possible and practicable to raiseboth of these pawls from the ratchet at once. In weaving heavy goods itis found to beiimpracticable to raise both of these pawls from theratchet on account of the increased ten sion,hereinafter explained,andit is also found unnecessary to let back the take-up roll. I thereforesimply release the detent by loosening bolt T and also disconnect itfrom the actuating-pawl H, and I have a mechanism, as shown in Fig. 3,which will instantly arrest the take-up when the fork fails to find thefilling and allows it to remain at rest for the required number ofpicks, the action of which is as follows: When the fork is thrown backin the manner described above, the detent b is raised from engagementwith the ratchet-wheel F and instantly slides forward by its own gravityuntil the regulatingscrew 19 in its end brings up against the guide-boltT. When the loom is started again, this detent, which is nowextended,drops into engagement with the ratchet-wheel. Each forwardstroke on the actuating-pawl carries this detent back the necessarydistance to allow the pin t to engage another one of the notches in theslot b until said detent has worked back to the position shown in Fig.3, where the guide-bolthas brought up in the end of slot 1), in whichposition it acts to and prevents a further backward movement of saidratchet-wheel, and the actuating-pawl is then allowed to feed thetake-up as the loom proceeds to weave.

My improved device, as herein shown and described, is broadly for thepurpose of preventing the weaving of thin places in cloth and may beoperated in two different ways: First, when used in Weaving light goodsit lets back two or three picks when the shuttle fails to lay thefilling, and, secondly, in weaving heavy goods it may be set to stop thetake-up roll and hold it at rest for a predetermined number of picksuntil the filling is again laid in and beat up correctly. The reason forletting back on light goods is in practical weaving when the loom isrunning at a high speed it is found that the last pick laid is thrownwell forward by the momentum of the lay, while on starting up again thefirst two or three picksare not set so well forward, as the lay has notreached its maximum speed and throw. This difference is particularlyapparent in light goods, where thin places are left. To overcome this,the take-up is let back three or four picks and the cloth is wovenperfect. In weaving heavy goods a different condition of affairs exists.There are more threads in the warp to the inch, and these threads areall under a heavier tension, the filling is also laid in closer and beatup harder,

and the lay therefore cannot set' the fillingthreads so far ahead as itdoes in the lighter goods. This'is accounted for largely by the lostmotion which exists to a greater or less degree in all reciprocatingmechanism, and under these conditions it is found that to allow thetake-up roll to remain at rest for two or three picks in the heaviergoods produces the same result as letting back a like number in thelighter goods, thus obtaining the same perfect work in both cases.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a loom take-up mechanism, a ratchetwheel, a detent-pawl, means forallowing said detent to slide forward a predetermined distance whenraised from said ratchet-wheel, an actuating-pawl, means whereby saiddetent is carried back to its rest position by successive steps at eachstroke of the actuating-pawl, substantially as described.

2. In a loom take-up mechanism, a ratchetwheel, an actuating-pawl, aweft-fork-operated shaft, a plate mounted on said shaft, a detent-pawlmounted on said plate, means for allowing said detent to slide forwardwhen raised from said ratchet wheel and means for returning said detentby successive steps by the action of the actuating-pawl, substantiallyas described.

3. In a loom take-up mechanism, aratchetwheel,a detent-pawl, means forallowing said detent to slide forward a predetermined distance whenraised from said ratchet-wheel,adjustable means for determining thedistance said detent shall slide forward, an actuatingmeet pawl, meanswhereby said detent is carried back to its rest position by successivesteps at each stroke of the actuating-pawl, substantially as described.

4. In a loom take-up mechanism, a ratchetwheel,a detent-pawl,adjustablemeans whereby said detent may be allowed to slide forward apredetermined distance when raised from said ratchet-wheel or set up andretained in its inward or rest position, means for returning said detentby successive steps to said inward or rest position by the action of theactuating-pawl when said detent is allowed to slide forward, incombination with a removable connection between said detent andactuating pawls when said detent-pawl is fixed in its inward position,substantially as described.

5. In a loom take-up mechanism in combi nation a ratchet-wheel, adetent-pawl, ad-

justable means whereby said detent may be allowed to slide forward whenraised from said ratchet-wheel or set up and retained in its inwardposition, means for returning said detent to said inward position by theaction of the actuating-pawl when said detent has slid forward, aremovable connection between said detent and actuating pawls when saiddetent-pawl is fixed in its inner position, substantially as described.

6. In a loom take-up mechanism in combination a ratchet-wheel, adetent-pawl, adjustable means whereby said detent may be allowed toslide forward when raised from said ratchet-wheel or setup and retainedin its inward position, means for returning said detent by successivesteps to said inward position by the action of the actuating-pawl whensaid detent has slid forward, a removable fiexible connection betweensaid detent and actuating pawls when said detent-pawlis fixedin itsinner position, substantially as described.

In testimony whereof I have hereunto set my hand this 2d day of July, A.D. 1903.

ARTHUR F. CASWELL.

In presence of- SALLIE W. HALL, ROBERT J. BELCHER.

